Flux used for brazing aluminum-based alloy

Details Flux used for brazing aluminum-based alloy Flux used for brazing aluminum-based alloy

1988-09-20

1990-03-06

McDowell, Robert

Metal treatment

Compositions

Fluxing

228223, 22826317, B23K 3534

Patent

active

049063073

ABSTRACT:
Fluxes for use in brazing aluminum-based alloy pieces are disclosed. One is a flux which comprises 70 to 90% wt % K.sub.2 SiF.sub.6 and 30 to 10 wt % AlF.sub.3. The other is a flux which comprises 98.5 to 94 wt % base composition which includes K.sub.2 SiF.sub.6 whose amount is 70 to 90 wt % of the base composition and AlF.sub.3 whose amount is 30 to 10 wt % of the base composition; 0.5 to 3 wt % LiF; and 1 to 3 wt % NaF. In order to facilitate the application of the flux to the pieces to be brazed, polybutene is used as a dispersing agent.

REFERENCES:
patent: 3951328 (1976-04-01), Wallace et al.
patent: 4541876 (1985-09-01), Hwang
patent: 4645119 (1987-02-01), Haramaki et al.
patent: 4723597 (1988-02-01), Sonoda

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